Means for supplying fuel mixture to gas-engines.



H. J. GAlSMAN.

MEANS FOR SU-PPLYING FUEL MIXTURE T0 GAS ENGINES.

APPLICATION FILED MAR. 13. 1916.

Patented June 19, 191

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HENRY J. GAISMAN, 0F WOODMEBE, NEW YORK.

MEAES FOR, SUPPLYING FUEL MIXTURE T0 GAS-ENGINES.

Specification of Letters Patent.

Patented June 119, 191?.

Application filed March 13, 1916. Serial No. 83,753.

To all whom it may concern."

Be it known that I, HENRY J. GAisMAN,

a citizen. of the United States, and resident of Woodmere, in the countyof Queens and late of New lork, have invented certain new and usefulImprovements in Means for bupplying Fuel Mixture to Gas-Engines, ofwhich the following is a specification.

The object'of my invention is to provide means to automatically controlthe flow of liquid fuel into the carbureting or mixing chamber of acarburetor for internal combustion engines, in accordance with thetemperature conditions of the manifold connecting the carburetor withthe engine cylinder or cylinders, whereby a relatively rich mixture maybe obtained for starting the engine, and the liquid fuel supply may bereduced automatically as the engine speeds up during operation.

In carrying out my invention 1 provide a fuel mixture manifold inthermal relation to exhaust gases flowing from the engine, a carbureterhaving its mixture outlet incommunication with said mixture manifold,and a thermally acting element, such as a thermostate, in thermalrelation to the heated manifold and operatively connected with thefuelcontrol valve for the carbureter, whereby when the engine is coldsaid valve may be so set as to permit the production of a rich mixturein the carburetor, and as the manifold becomes heated said thermalelement will cause the valve to more or less restrict the flow of heatedfuel to the carburetor and reduce such richness of the mixture for theproper operation of the engine.

My invention comprises novel details of improvement and combinations ofparts that will be more fully hereinafter set forth and then pointed outin the claims.

Reference is to be had to the accompanying drawings forming part hereof,wherein,

Figure 1 is a plan view lllustrating my improvements in connection withan internal combustion engine;

Fig. 2 is a side view of Fig. 1;

Fig. 3 is a section on the line 3, 3, 111 Fig. 1;

Fig. 4 is an enlarged section on the line 4, a, in Fig. 2;

Fig. 5 is a section on the line 5, 5, in Fig 2, and

Fig. 6 is a partly sectlonal detail view hereinafter referred to.

Fig. 7 is a detail View of the needle valve and thermostat.

Similar numerals of reference indicate corresponding parts in theseveral views.

The manifold indicated generally at 1 comprises a casing provided with achamber or passage 2 having ports 3 in communication with exhaust ports4: of an internal combustion engine 5, said casing also being shownprovided with a chamber or passage 6 in thermal relation to chamber 2 tobe heated by hot exhaust gases in the latter chamber. Chamber 6 is shownprovided with tubular passages 3" passing through chamber 2 and adaptedfor open communication with inlet ports 8 of the engine, the arrangementbeing such that mixture flowing into chamber 6 from a carbureter,indicated at 9, will be heated in its passage to the engine cylinders.The manifold may be attached to the engine by studs or bolts 10, shownpassing through cored passages 11 in the manifold. The carburetor 9 maybe attached to the manifold to supply mixture to the chamber 6, asthrough the inlet opening 12 of said chamber with which the carburetermixture-outlet communicates. The carburetor may be of any desiredconstruction, and is shown provided with a needle valve 1 adapted tocontrol the orifice or jet 15 which provides communication between theconstant-level fuel chamber 16 of the carburetor and the carbureting ormixing chamber 17 of the carburetor. The needle valve 14 is connected toor carried by a thermal element 18, which is located adjacent to themanifold in such manner as to be heated by the latter to cause movementor adjustment of the needle valve with respect to orifice 15 of thecarbureter. The thermal element or thermostat 18 may be secured to themanifold by means of screws or studs 19. The thermostat may comprise aplurality of strips 18", 18 of different metals so arranged that whenthe manifold is cold said thermal strips will tend to move valve 14:away from orifice 15 to permit the flow of fuel from said orifice forthe production of a relatively rich mixture, and when the thermal stripsare heated by reason of their thermal relation to the manifold, saidstrips will move the needle valve reversely to reduce the flow of fuelfrom orifice 15. I

i have shown the needle valve 14 tapered at its lower end 14* forcoaction with fuel orifice 15. The upper end of said needle valve isshown guided in an arm 20 secured to the thermostat, and for the purposeof adjusting the needle valve 14: relatively to the fuel orifice 15 Ihave shown one of the thermostat strips provided with a screw 21 meshingin threads in said strip and coacting with the upper end of the needlevalve. The needle valve 14: is shown provided with a shoulder '22bearing against strip 20. Strip 20 may be in the form of a springtending normally to hold the needle valve against screw 21. The needlevalve may pass freely through an opening 9 in the carbureter, wherebythe valve is guided with respect to fuel orifice 15.

By reason of the thermal relationof the manifold mixture chamber 6 tothe manifold exhaust chamber 2, a mixture for the engine may be utilizedforgeneral work that is leaner than if manifold 6 were not heated,becauselof the heating of the mixture in the manifold, but with such amixture starting of the engine might be difficult when cold with theneedle valve set for such mixture. By reason of the connection of theneedle valve, however, with the thermal element or thermostat 18, thatis in thermal relation to the manifold, the needle valve may be set topermit a relatively rich mixture to be produced when the engine is cold,and then when the manifold becomes heated the thermostat will likewisebe heated and thereby will operate or expand to cause the needle valveto move toward orifice 15to reduce the flow of liquid fuel therefromtofurnish a relatively lean or correct mixture, which, when heated inits passage through chamber 6 of the manifold, will be suihcient for therequirements of the engine. The needle valve may be adjusted withrespect to orifice 15 for production of the desired character ofmixture, while the engine, the manifold and the thermal element 18 areheated and then when said parts are cold and the thermal element 18contracts, the needle valve will be withdrawn from'orifice 15 ready forstarting of the engine.

My improvements are advantageous in that the movement of the needlevalve for regulating the flow of liquid fuel to the carbureting ormixing chamber is automatically controlled according to the temperatureof the manifold, and the operator is not required to reset the needlevalve for the general running of the engine, because of the richness ofthe starting mixture, for as soon as the engine and manifold become hot,and the thermal element becomes correspondingly heated, the needle valvewill gradually close toward orifice 15 to reduce the flow of liquid fuelfrom said orifice. By the means described an economy in fuel consumptionmay be effected because the heated mixture does not require so great asupply of liquid fuel as an unheated mixture, and yet the requiredsupply of liquid fuel for the mixture is ready at hand for differentengine conditions.

'My invention is not limited to the particular details of constructionand relative arrangeme'nt of parts set forth herein, as the same may bevaried, within the scope of the appended claims, without departing fromthe spirit of'my invention.

Having now described my invention, what I claim 1s:-

1. The combination of a manifold having a passage for mixture, means toheat said passage, a carbureter communicating with said passage, a valveto control the flow of fuel in the carbureter for the mixture, and athermal element operatively connected with said valve and controlled bythe temperature of the mixture due to its thermal relation to saidheating means.

2. The combination of a manifold having a passage for exhaust gases, apassage for mixture in thermal relation thereto, a carburetercommunicating with the second named passage, a valve to control the flowof fuel to the carbureting chamber and a thermal element connected tosaid valve and controlled by the resultant temperature due to thethermal relation of the mixture to the exhaust gases.

3. The combination of a manifold having a passage for mixture, means toheat said passage, a carbureter communicating with said passage, a valveto control the flow .of fuel in the carbureter for the mixture,

a thermal element operatively connected with said valve and controlledby the temperature ofthe mixture due to its thermal relation to saidheating means, and means for adjusting the valve with respect to thethermal element.

4. The combination of a manifold having a passage for mixture, means toheat said passage, a carbureter communicating with said passage, a valveto control the flow of fuel in the carbureter for the mixture, a

said valve and controlled by the resultant temperature of the mixturedue to its thermal relation to said heating means, means for adjustingthe valve with respect to the thermal element, and a spring interposedbetween the thermal element and the valve 7 thermal element operativelyconnected with the mixture to the exhaust gases for causing movement ofthe valve to reduce the flow from the orifice when the thermostat isheated.

6. The combination of a manifold having a passage for exhaust gases anda passage for mixture in thermal relation thereto, a carburetercommunicating with the second named passage and having a fuel orifice, avalve to control the flow from said orifice, a

thermostat operatively connected with said valve and controlled by theresultant temperature due to the thermal relation of the mixture to theexhaust gases for causing movement of the valve to reduce the flow fromthe orifice when the thermostat is heated, and means for adjusting thevalve relatively to the thermostat and said orifice.

7. A passage for a fuel mixture, means to heat said passage, means tosupply fuel mixture to said passage, means to control the supply ofliquid fuel for said mixture, and thermally operating means in thermalrelation to said. heating means and to said passage for fuel mixture andoperatively associated with said fuel controlling means to control thelatter by the temperature of the mixture due to its thermal relation tosaid heating means to vary the supply of liquid-fuel for the mixture.

Signed at New York city, in the county of New York, and State of NewYork, this 11th day of March, A.- D. 1916.

HENRY J. GAISMAN.

Witnesses:

T. F. BOURNE,

E. GRAEF.

